#area{
    width: 900px;
    height: 900px;
}
#area .item{
    width: 36px;
    height: 36px;
    line-height: 36px;
    text-align: center;
    background: #fe8855;
    color:#000;
    font-size: 18px;
    box-shadow:2px 2px 5px #d3c998;
    display: inline-block;
    margin: 1px 1px;
    vertical-align: top;
}
#area .br{
    margin: 0;
}
#area .marked{
    background: url("") no-repeat center center;
    background-color: rgb(250, 250, 250);
}
body{
    -moz-user-select:none;/*火狐*/
    -webkit-user-select:none;/*webkit浏览器*/
    -ms-user-select:none;/*IE10*/
    -khtml-user-select:none;/*早期浏览器*/
    user-select:none;
}